Monday, January 13, 2014

Java JDBC programming Example 8

//Note: create  a DSN in the name of sql that is pointing the table name limbs in the database with three String column  names things,legs,arms





//UPDATING ROWS NOT WORKING
//scrollable,sensitive concurent updatable record set
//records will be printed in reverse order
//updaing no of arms that means 3ed column
import java.sql.*;
import java.net.*;
class Jdbc8{
public static void main(String...arg) throws Exception{
System.out.println(InetAddress.getLocalHost());
         Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
         Connection c =  DriverManager.getConnection("jdbc:odbc:sql");
         Statement  st = c.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,
  ResultSet.CONCUR_UPDATABLE);
         ResultSet r = st.executeQuery("select * from limbs");
        try{  
r.afterLast();  //working only with scrollable rs
while(r.previous()){
       
              System.out.print(r.getString(1)+" ");
              System.out.print(r.getString(2)+" ");
                  int arms = r.getInt(3);
                                     arms = arms+5;
r.updateInt(3,arms);
              System.out.println(r.getInt(3));
  }
        
         }catch(Exception e){System.out.println("Hello");e.printStackTrace();}
      r.close();
      st.close();
      c.close();
}
}

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